OpManager automatically discovers and maps resources across the network and presents an integrated view of the enterprise in a single NMS console. It actively monitors the network and notifies operators by email / SMS when a fault occurs. OpManager provides reports and graphs for Interface statistics, CPU, Memory, Disk statistics and service response-times and availability. OpManager provides more than 160 out-of-the-box monitors to manage Cisco devices, MS-Exchange, Active Directory (version 6.0 has Exchange & Active Directory monitor add-ons), Lotus Notes, Oracle, MSSQL, Dell and Compaq servers. It also comes with an Add-on for MS SQL DB backend support. It supports adding custom monitors to monitor any SNMP parameter. The 20 Node Small Ne twork Edition is available Free of cost.